Grease gun



w. A. YEAGHER, JR.

GREASE GUN.

APPLICATION FILED MAY7. I913.

' Patented Aug. 1, 1922.

m y W M i A l WILLIAM A. YEAGl-IER, JR., OF NEW BRUNSWICK, NEW JERSEY, ASSIGNOE OF ONE- THIRD TO FRANCIS IMULVEY AND ONE-THIRD TO THOMAS H. I-IOXVLEY, BOTH OF NEW BRUNSWICK, NEW JERSEY.

GREASE GUN.

Application filed. May 7, 1913.

To all whom may concern:

Be it known that I, lViLLIAM A. Ynnoirnn, J13, a citizen of the United States, residing at New Brunswick, in the county of Middlesex and State of New Jersey, have invented 'new and 'iiiseful Improvements in Grease Guns, of which the following is a specification.

The general object of the invention is to improve what are generally known as grease guns in point of rendering these devices more easily to fill or charge with pasty lubricant. And to this end the invention resides in constructing the magazine, cylinder or barrel of relatively short or hollow sections detachably connected together at their adjacent ends, whereby, to have when the sections are disconnected and each handled separately in the operation of filling, not the relativelylong and narrow receptacle which forms the barrel of the ordinary grease pump and into which it is extremely dillicult to introduce grease with a ladle or uniformly pack the grease therein,

but a comparatively shallow receptacle into which the grease may be readily directed with a ladle and uniformly packed.

Other objects will appear and be better understood from that embodiment of my invention of which the following is a specification, reference being had to the accompanying drawing forming part hereof, in which-- The figure is a view partly in elevation and longitudinal section of the invention.

The magazine, barrel or receptacle is indicated. generally by c and the ends or heads thereof by b-b. The feed. mechanism which forces the lubricant from the barrel a, may be of any preferred construction and in the embodiment shown consists of the piston or plunger 0 to which is connected one end of a screw-threaded rod d, that passes loosely through a sleeve 6 surrounding a central opening in the rear cap or head I) and which is exteriorly screw-threaded to accommodate a screw-threaded bushing 7, through which the screw-threaded rod (Z is screwed, the said rod being surmounted with an operating handle 9.

l fith this construction it will be observed that when the parts are positioned as shown in the drawing the movement of the plunger in the direction of the length of the barrel Specification of Letters Patent.

Patented Aug. 1, 1922.

Serial No. 766,143.

is had by turning the handle 9, but upon unscrewing the bushing f from the sleeve 0, a corresponding movement on the part of the plunger 0 is had by applying hand pressure on the handle 9 and in the direction of the length of the barrel. With these alternative methods of operating the plunger (0 gradual or abrupt feed may be had. 7

The nozzle herein indicated generally by it and attached to the forward head Z), is adapted to function as a controller for varying the diameter of the pencil of lubricant directed from the gun onto the part to be lubricated, whereby, to facilitate the operation of the feed mechanism in expelling the lubricant when relatively thick lubricant is used or to somewhat retard the passage of the lubricant when relatively thin lubricant is used, or to obtain a maximum of lubricant of any consistency in a minimum of time on arelatively large and exposed part, or to direct lubricant of any consistency into a comparatively narrow space. This function on the part of the nozzle is had by constructing the same of a plurality of sections detachably connected together at their adjacent ends and differing from each other in point of diameter of bore. In the drawing the nozzle is shown as formed of the sections 5 and 6, the former of which is of uniform diameter and the latter of which is tapered and detachably connected to the section 5 by screw threads which interfit with screwthreads in the outer end of the section 5, a stop in the form of a collar 7 being provided to limit the entrance of the section 6 into the section 5, it being understood that the screw-threaded part of the section 6 or that beyond the collar 7 is cylindrical.

The volume or capacity and appearance of the barrel, cylinder or magazine a correspond approximately to that of the corresponding part of the ordinary grease gun. With the latter type of gun, however, the rear head is detachably connected to the barrel for the purpose of permitting when detached, the withdrawal of the plunger from the barrel, this removing of the plunger being necessary in order to effect the filling or charging of the barrel with lubricant. The ordinary type of barrel, however, is a continuous or single piece and since it is de signed to hold a relatively large charge of grease in order to obviate the necessity of frequent refillings, it is necessarily relatively long and narrow and presents when the rear head and plunger are detached, a receptacle which is extremely ditlicult to completely lill and in which it is impossible to uniformly pack pasty lubricant without the loss at least of considerable time.

Now with the present construction the barrel (4 is formed of a plurality of detachably connected sections which are so constructed as to function as a single piece barrel in point of permitting the feed mechanism to operate when connected together, but when disconnected from the other, each presents a receptacle whose length is out of all proportion to its diameter as contrasted with the barrel of the ordinary grease cup in that the said length is equal more or less to twice the diameter, hence a less amount of lubricant will be required to fill the receptacle and upon the introduction of each ladle full of lubricant, the packingthereof may be more readily effected by reason of not having to use the end edge of the ladle to force in the lubricant. Thus it will be seen that with this construction the time required in filling and packing a plurality of sections will be-less than that required in packing a single piece barrel with which the said sections correspond in volume when connected together.

In the embodiment shown the barrel a is made up of two sections indicated by 8 and 9. The outer section 9 is formed with a collar 10 which is counter-bored and screw threaded so as to accommodate the screw threaded inner end portion 11 of the section 8. It will be understood, of course, that this form of connection between the sections 8 and 9 of thebarrel and the sections 5 and 6 of the stem, is simply illustrative of one em bodiment of the invention. And it will be further understood that although the several parts are herein'shown as formed of metal, other material, if found desirable, may be used or the device may be made up of a combination of different metals, or these and other substances.

lVhat is claimed as new is:

A lubricant gun comprising apair of tubes having outer heads and open inner ends, each tube forming a relatively deep cup having the same internal diameter as the other cup, means detachably to connect said open inner ends that said tubes may be normally connected in end-to-end relation and may be separated to facilitate the filling of the lubricant gun by filling each of the deep cups independently with lubricant through the open end thereof, a nozzle for one of said tubes, a piston constructed to slide snugly in each of said tubes, and means to move the piston through said tubes to force the lubricant therefrom.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM A. YEAGHER, JR. lVitnesses THOMAS H. HowLEY, Fnanors MULVEY. 

